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Drill 3D Tool Tutorial and Technical Note

Oasis montaj 5.1.7

www.geosoft.com

The software described in this manual is furnished under license and may only be used or copied in accordance with the terms of the license. Manual release date: 3/4/2003. Written by Nancy Whitehead and Tim Millis. Please send comments or questions to [email protected]

Copyright Geosoft Inc. 2003. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form, or by any means, electronic, mechanical, photo-copying, reading, or otherwise, without prior consent from Geosoft Inc.

Program Copyright Geosoft Inc. 2003. All rights reserved. Geosoft and Oasis montaj are registered trademarks of Geosoft Inc. GEOSOFT, Oasis are trademarks of Geosoft Inc.

Windows, and Windows NT™ are either registered trademarks or trademarks of Microsoft Corporation. Geosoft Incorporated 8th Floor 85 Richmond St. W. Toronto, Ontario M5H 2C9 Canada Tel: (416) 369-0111 Fax: (416) 369-9599 Web Site: www.geosoft.com E-mail: [email protected]

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Contents Drill3D Tool Overview 3

Working with the Drill3D Tool 4

Licensing 4

Selecting an Area of Interest 4

Creating a Drill3D Map 6

Working in the 3D View 11

3D Map Components 11

3D Tool and 3D Viewer 12

View Tab 12

Planes Tab 12

Axis Tab 14

3DCon Tab 14

Using the plane transparency to “hide” groups 15

Using the View/Group Manager Tool to “hide” groups 15

Dynamic Linking in the 3D Viewer Environment 17

Adding Planes to a 3D View 17

Displaying 3D grid directly to a new plane 17

Displaying normal XY grids directly to a new plane 19

Adding relief surface as a new plane 21

Copy and paste section views to 3D views 24

3D View Control Tips 27

Offsetting planes for easier viewing 27

Using plane transparency to view integrated data 28

Drill3D Tool - Tutorial and Technical Note 2

Drill3D Tool Overview The Drill3D Tool developed as an add-on for Geosoft’s Target and Wholeplot applications enables you to display drillhole, surface and other data types in an interactive three-dimensional environment. Drill holes are displayed in their “true” three-dimensional location and can have up to two different data types plotted along their trace.

Grids created in “sectional” views (e.g., from Wholeplot or Interactiv IP applications) can be displayed directly into the 3D view, in their correct orientation, using Geosoft’s “on-the-fly” technology. Other grids and images (including bitmaps and jpegs) can be opened and easily located in any specified orthogonal plane.

Using the 3D Tool you can interactively control the transparency of the individual planes, enabling the data to be displayed with a cumulative (light-table) effect. Data such as MapInfo tables and 2D DXF files can be imported directly into the 3D environment and drawn on any surface displayed in the current 3D view.

The Oasis montaj Group/View Manager Tool enables you to toggle on/off individual groups in the 3D view, enabling changes to the displayed data, without having to recreate 3D maps.

All data in the Oasis montaj environment is dynamically linked; from the database through cross-section and map through to the 3D environment.


Working with the Drill3D Tool You can begin creating a Drill3D view once all the appropriate project information has been imported into your drillhole database. The data files provided for the “Wholeplot Tutorial”, located in the C:/Oasismontaj/data/Wholeplot/ directory, will be the basis of this technical note. This technical note begins with project data (collar, survey, assay, and geology) already imported into the Oasis montaj system and the “Plan” map created, opened and displayed in the current workspace.

Licensing Drill3D, designed as an add-on tool for the Target or Wholeplot application, is sold and licensed separately. However, once a licence has been added to your “Red License Disk”, the menu item “3D map…” will be displayed on the DH-Plot menu.

Selecting an Area of Interest To begin, we need to select the area that we would like to concentrate on from the project ”Plan” map. This will enable us to display only the area of the project that is of interest to us.

TO SELECT DRILLHOLE:

1. Make sure your plan map is open and selected in your workspace.


2. On the DH-Plot menu, select Select holes|By area…. The Define polygon dialog will be displayed.

3. Click the [OK] button to interactively define a polygon on your map. 4. Using your mouse, define a polygon around the holes in the central portion of the

drill area. When finished, click the right mouse button and select Done from the popup menu. The system selects the holes within the defined boundary.


Creating a Drill3D Map Drill3D provides a new perspective to traditional drillhole data. You can now view borehole traces and gridded data from different angles—in 3 dimensions, making it easier to spot the relationship between surface and sub-surface features.

1. On the DHPlot menu, select 3D Map. The Drill3D Map Parameters dialog will be displayed. The first tab Page Layout is displayed by default.

2. In the Map Name box, enter a map name (Drill3D). 3. The following page layout parameters can be controlled from this tab; selecting

paper size using the Template dropdown menu, specifying the Margins (cm) that surround the plot area, the Background Colour of the 3D view, the Axis Colour and Font used for annotating the 3D view, selecting to Plot Legend (right side of map), including company Logo (image file) and specifying the map Titles.


4. For the purpose of this technical note, we accepted the “intelligent” default values and selected the Hole Traces tab.

5. This tab dialog includes the following drillhole trace parameters; Width and Colour of the hole trace, and the Hole Labels and Depth Ticks (annotations) along the hole trace.

6. We accepted the default values and selected the Data tab.

7. The Data and Plot type is selected from dropdown lists, just as you would select data for your Plans or Sections. For this exercise, we selected Au to be plotted as Numeric bands and Lith1 as Post Text.

Note: In Drill3D only two sets of data can be plotted down hole along the trace (Left side and Right side). When these data appear in the 3D Viewer, the


point-of-view will always remain the same, no matter how the image is rotated, panned or zoomed; i.e. the Au numeric band will always appear down the left-hand side of the trace in this 3D view.

8. Plan oriented Gridded data can also be created from this tab. In this case, we gridded the Au data using a minimum curvature technique (a kriging technique is also available).

9. To define the Gridded data parameters, click the [Define] button. The Minimum Curvature Gridding dialog is displayed.

10. The Data channel (column) to be gridded is displayed (Au (assays)). You can add a File name tag to the grid, this is useful when distinguishing between grids created using different gridding parameters.

11. For this exercise, we used the same Colour zone file that we used for the Numeric bands.

12. In the Location section of the tab, we defined the initial grid elevation or Relative Level as (50) metres and left the Averaging Interval as the default value of (1) This means that data within one metre of this elevation will be used to create the grid, the values being averaged for this thickness.

13. We also specified in the Multiple Grids section that we wanted (3) grids in total, incrementing at (50) metres downwards (i.e. 50RL, 0RL and –50RL).

14. To specify that the log of the data be used to create the gridded image (which should be done with all log distributed assay data), we selected the [Advanced gridding options…] button. The Minimum Curvature – Advance Options dialog box is displayed.


15. Using the Log option dropdown list, select (Log) and in the Log minimum box, specify (0.01). Note that, the minimum value for the Au channel (column) is 0.01.

16. Click the [OK] button to return to the previous dialog. 17. The final parameter on the gridding parameters dialog is the Transparency. Using

the slider you can control the level of transparency of the gridded data in the 3D view. For this exercise, we set the slider to approximately half way.

18. Click the [OK] button to return to the previous dialog. 19. Select the Topography tab.

20. Check the Plot topography box to enable the topography parameters. 21. Using the [Browse] buttons, locate (in your working directory) the Topography

grid file topo.grd and the Overlay grid on topography mag.grd file. Note that, in this case we are using the topography grid to display the surface relief and colouring the surface using a magnetic grid image.


22. Check the Grid Clipping box, and specify 10 metres (ground units) for the Border size.

23. Using the Transparency slider set the transparency of this plane to approximately 50 %.

24. The final tab Load/Save is used to save the map and data parameters to file for either sharing with other users, or so these particular map settings can be used at a later date. For the purposes of this exercise, we will not save.

25. Click the [OK] button and the Drill3D map will be created and display in your workspace (background) and in the 3D Viewer (foreground).


Working in the 3D View Initially, when a 3D map has been created, the 3D Viewer is displayed in the foreground of your workspace, with the map opened in the background.

3D Map Components The Drill3D map includes drillhole traces and attributes, grid and or image files, and map surrounds. Opening the Map View/Group Manager tool will enable you to see the different views and groups in the 3D map.

TO SEE THE VIEWS AND GROUPS IN THE 3D MAP:

1. Select (make active) the Drill3D map.

2. From the Mapping Toolbar, select the View/Group Manager button ( ). The Map View/Group Manager tool will be displayed.

3. You will see that the drillhole traces (Holes) and the two plotted attributes (DhAssay_Lith1 and DhNumBand_Au) are separate “groups” within the 3D “view”. You will also note that the four gridded Planes (AGG_au_rl3, AGG_au_rl2, AGG_au_rl1 and AGG_mag) are also separate groups within the 3D view. Each 3D group can be controlled the same way other groups in Oasis montaj are controlled (Bring Forward/Backward, Hidden, Moveable, Masked, Edited and Deleted).

However, there are many more display controls available for images and surfaces using the 3D Tool and 3D Viewer.


3D Tool and 3D Viewer The 3D Tool consists of a dialog with four tabs and a 3D Viewer. Each tab enables you modify different aspects of the 3D View within the 3D Viewer.

• View tab enables you to modify the overall view of the 3D View on a map.

• Plane tab enables you to modify the individual planes within each 3D View

• Axis tab enables you to add labels, axis, and a box around the 3D View.

• 3D Con tab enables you to adjust the rendering resolution in the 3D tool.

View Tab

The View tab displays the visualisation controls for viewing in 3D—Rotate, Zoom and Pan (these controls can also be selected from the popup menu, displayed when you right click in the 3D Viewer).

The Centre button resets the focus point of the view and the current 3D View is centred in the 3D Viewer (independent of the zoom).

The Slider bar controls the brightness of the image.

The Inclination, Declination and Distance are the current viewing parameters, relative to the central point. Inclination and declination can be fixed, so when rotating, that particular angle will always be used (e.g. fixing inclination at 25 degrees will only allow a rotating view around the central point where the point of view is locked at 25 degrees above the horizon).

Planes Tab

The Planes tab enables you to modify the individual planes within each 3D View. This tab controls the display and viewing characteristics of surfaces and images displayed in the 3D Viewer.

All the planes in the 3D view are listed in the drop down box; in the example here, the three gridded image of Au are listed as planes (–50RL, 0RL and 50RL) and the topography that we draped the magnetics image over is listed as surface (by default).


If the Plane is a “flat” surface, i.e. the image is not draped over a topographic relief surface, only the Offset and the Transparency can be controlled, as shown here.

If the Plane has a topographic surface (i.e. has X, Y and “depth” components) has additional controls:

Sample – the sampling resolution of the relief surface grid (16 to 512, 256 is the default)

Base – the base value of the grid relative to the Z-axis. Zero (0) implies that the relief surface’s Z values are relative to the Z-axis.

Scale – the vertical exaggeration of the relief surface. A scale of 1 indicates that the relief surface is to true scale.

Clip min and max – minimum and maximum values in the relief grid. These can be set to clip higher or lower values in a surface.


Axis Tab

The Axis tab enables you to annotate the X, Y and Z-axis with whatever nomenclature you wish to use. For clarity, we entered; Easting, Northing and Depth for this exercise.

3DCon Tab

The 3Dcon tab enables you to set the rendering resolution for 3D Views. Full rendering occurs every time you modify the 3D view and the view is redrawn, fast rendering occurs when the image is constantly in motion; for example while rotating, zooming or panning.

For users with graphics cards that are of low memory (below 64Mb) and/or slower processors, then it is recommended to leave these at the default settings while working in the 3D environment as it makes heavy use of the resources in the video card.

Note: The controls on this tab are system controls and changes made to this tab will affect all 3D maps in your Oasis montaj system.


Using the plane transparency to “hide” groups As demonstrated earlier, the transparency of the individual planes can be controlled using the 3D Tool.

TO HIDE GROUPS USING 3D TOOL:

1. On the Planes tab of the 3D Tool, select the 50RL, 0RL and 50RL planes and reduce the transparency of each plane to zero (slide the slider bar completely to the left) and increase the transparency to opaque for the Surface plane (slider bar completely to the right).

2. Then by selecting the Rotate radio button on the View tab, manipulate your view to resemble the one below.

Using the View/Group Manager Tool to “hide” groups As discussed earlier, any group in the 3D view can be hidden from display by selecting the relative group from the Map View/Group Manager tool and checking the Hidden box. Note that, the 3D Viewer does not have to be closed, just select (make active) the actual 3D map and the Map View/Group Manager tool will become available.

TO “HIDE” GROUPS USING THE MAP VIEW/GROUP MANAGER TOOL:

1. Select (make active) the actual 3D Map.

2. From the Mapping Toolbar, select the View/Group Manager button ( ). The Map View/Group Manager tool will be displayed.

3. In this case, we selected (highlighted) the DHAssay_Lith1 group and checked the Hidden box.

4. Click the [OK] button to close the Map View/Group Manager tool.


5. Select (make active) the 3D Viewer; the 3D Tool is again displayed. We can now zoom in and begin looking at our data in greater detail.


Dynamic Linking in the 3D Viewer Environment Dynamic linking provides an interactive graphical connection between databases, profiles and any number of maps in your workspace. Dynamic linking is also available in the 3D Viewer. When activated, any item or position selected in a database, profile or map will be highlighted in all.

Below is an example of how the same interval is highlighted and linked in the assay database spreadsheet, profile window, section map and in the 3D view.

Dynamic Links

Adding Planes to a 3D View Additional data can be added to your 3D view using a variety of methods, such as:

• Register and display a grid directly to a new plane, using

a. A 3D registered grid from Wholeplot or Interactiv IP

b. A normal XY grid to a plan or section orientation

• Manually create new planes that represent a relief surfaces, and

a. Add data from another source, such as a MapInfo tab

b. Drape a grid image over a relief surface

• Copy an existing section view and paste to a 3D map

Displaying 3D grid directly to a new plane Any grid created in a sectional view within Oasis montaj (i.e. using Wholeplot sections or Interactiv IP pseudosections) will be displayed in their correct XYZ orientation within a 3D view.

Note: Before we can display a section grid to a new plane we needed to create the grid in Wholeplot. The following procedure provides the steps necessary to create section grid. The Assay database is used to create the Wholeplot “12000E Section” grid (s12000e_Au.grd) used in this segment. The Au channel is gridded using the Minimum curvature gridding technique.


TO CREATE A SECTION GRID IN WHOLEPLOT:

1. On the DH_Plot menu, click Section. The system displays the Section parameters dialog.

2. Select the Section Location tab. 3. In the Location and Orientation box, specify the Easting Ref. as (12000), the

Northing Ref. as (10000) and the Thickness as (500). 4. In the Selection Azimuth box, select (N-S) and for the purposes of this tutorial you

can accept the rest of the default values. 5. Select the Data tab. 6. Using the Data dropdown list, select the data channel in the current Wholeplot

project you want to plot (Au [assays]).

Note: The selections combine the name of the channel, along with the identifier for the project database in which the channel is found.

7. Using the Plot Type dropdown list, select the plotting type (Grid: Min curvature).

8. We can accept the remaining default parameters; click the [OK] button. The section map will be created including an Au section grid (s12000e_Au.grd). It is this grid that we will display directly to a 3D plane. TO DISPLAY A 3D GRID DIRECTLY TO A PLANE:

1. On the Grid menu, select Display grid|Single grid 3D view…

2. The Single grid to 3D view dialog will be displayed.


3. Using the [Browse] button locate the section grid (s12000e_Au.grd(GRD)). 4. The Colour table being used is the “Au_WP.itr” file. This file was created we

displayed the An channel as numeric bands in the 3D view.

Note: The Au_WP.itr file was saved to your working directory. Using the [Browse] button, locate your working directory and make sure that the Files of type is set to (*.itr).

5. We can leave the remainder of the parameters to the “intelligent defaults” and click the [OK] button. The grid (s12000e_Au.grd) will be drawn to a new plane called s12000e_Au in the correct location and orientation.

Displaying normal XY grids directly to a new plane Any “normal” grid or image (i.e. a grid or image that does not have associated 3D coordinates) can be located in either a plan (X, Y plane) or “section” orientation.

The following example uses the (soil_au.grd) file from the Wholeplot tutorial data and orientates it to a sectional “view”.

TO DISPLAY A “NORMAL” GRID DIRECTLY TO A PLANE:

1. On the Grid menu, select Display grid|Single grid 3D view… The Single grid to 3D view dialog will be displayed.


2. Specify the parameters as shown above and click the [OK] button. The Set Grid Orientation dialog will be displayed.

3. This dialog enables you to specify the orientation of the grid in 3D space. 4. To display this grid as a “section”, select Section from the Orientation dropdown

list. 5. The grid must be "anchored" at a location in the 3D view. The Reference Point

parameter determines this anchor point. We wanted to anchor this grid at the Grid top centre. Thee grid can also be referenced to the original grid axes or the top or bottom left corner of the grid.

6. Entering the coordinates as shown above will locate the grid centred on the drilling orientated in an East West direction.


Note: The following two images are examples of registering a *.grd image of EM data and a *.jpg file of a Seismic image using the same menu.

Display EM data in *.grd format Display Seismic data in *.jpg format

Adding relief surface as a new plane The ability to add planes that represent relief surfaces enables you to locate data in true 3D space.

In the following two examples we create new relief surfaces and drape (colour) the surface with different images; we will create a relief surface plane and drape it with a MapInfo (*.tab) image and create a sub-surface relief layer that defines a weathering profile and colour it in a grey scale.

TO ADD A SURFACE RELIEF PLANE:

1. Using the right mouse button click inside the 3D viewer window, from the popup menu select Add new drawing plane…


2. We created a new plane in 3D view, and named it Geology. Using the [Browse] button, select the Relief surface grid (optional), topo.grd, based on the topography grid from the Wholeplot Tutorial.

3. Click the [Next>] button, the Relief surface grid dialog is displayed.

4. Specify the Relief base as zero (0) and Vertical scale as one (1), this will ensure that the grid is scaled and located correctly with respect to the drill holes.

5. Click the [Finish] button and a blank (invisible) plane will be added to the 3D View. The new ‘plane’ can be accessed through the Planes tab in the 3D Tool.


6. Make sure that the Geology plane is currently selected, so that we can drape a MapInfo *.tab file over it in the next step.

7. On the Map menu, select Import /MapInfo Tab file… The MapInfo Import dialog will be displayed.

8. Using the [Browse] button, select the simplified geology.tab file, from the Wholeplot Tutorial data set. From the Import data to dropdown list, select Do not import and from the Plot map to dropdown list, select Current map.

9. Click the [OK] button to drape the Geology plane with the simplified geology.tab file. The transparency of this plane can now be controlled to enable a light table effect with this particular layer so layers below can be seen.

TO ADD A SUB-SURFACE “SOLID” RELIEF PLANE:

Note: The grid used in this example represents a weathered/fresh rock interface (BOPO), as interpreted from the drilling, as a relief surface.

1. Create a new blank plane BOPO based on the “BOPO.grd” relief surface grid. 2. Ensuring that the BOPO surface is currently selected, on the Grid menu, select

Display grid/Single grid…The Place a grid on a map dialog is displayed.


3. Using the [Browse] button for Grid name, select (bopo.grd). Select Linear as the colour method and grey.tbl as the colour table. Note that, in this example as the grid is to be displayed as a solid surface representative of true topographic data, a linear stretch with a monochromatic colour table should be used.

4. The resultant image is displayed below.

Copy and paste section views to 3D views A section view (Wholeplot sections and Interactiv IP pseudo-sections) can be copied and pasted to the 3D map and then groups within this pasted view can be displayed in the 3D viewer.

In the following example, we copied and pasted the 12000E section view, which includes some interpretation CAD work that we wish to display in the 3D viewer. For more information on using the Oasis montaj CAD tools, see Chapter 3: Section Maps and Data Interpretation in the Wholeplot Tutorial.


TO COPY AND PASTE A SECTION VIEW TO A 3D MAP:

1. Using the Select/change the current View ( ) map tool, select the Section view from the 12000E section map, then right-click on the section map and from the popup menu, select Copy, the “Section View” will be copied to the clipboard.

2. Once the view has been copied, select (highlight) the Drill3D map (not the 3D viewer), right-click and from the popup menu, select Paste (not Paste Georeferenced). The “Section View” will be added to your Drill3D map.

3. To verify that the “Section View” has been added to your map, select View/Group Manager button ( ). The Map View/Group Manager tool will be displayed and you can see that the “Section” has been added as a “View” to the map:


4. We now must create a new plane in the 3D Viewer to display the data from the recently copied “Section View”.

5. Right-click on the 3D Viewer, from the popup menu, select Add new drawing plane. The Add a new drawing plane to a 3D view dialog will be displayed.

6. In the Name of new plane in 3D view box, specify the name of the new 3D view (12000E BOPO) and in the View or View/Group to draw on plane dropdown list, select the entire view or individual groups within a view. In this case, we selected the group that represents an interpreted surface in the section view (Section\12000_BOPO_Section_BOPO).

7. Click the [Next>] button; the New plane without relief dialog is displayed.

8. This dialog enables us to tell the Viewer how to register the new plane. Because the view already has a 3D orientation (section map view) we select Raw as the Transform method. The Plane offset can be left blank.

9. Click the [OK] button and the selected group from the “Section View” is drawn to a new plane (this example 12000E BOPO) in the correct location.


10. Select the Drill3D map again, and then select the View/Group Manager button. The Map View/group manager tool will be displayed.

11. You will notice that the selected “group” has been added to the 3D view; therefore if no more groups from the section view are needed then the entire “Section view” can be removed (deleted) from the Drill3D map by highlighting the Section view icon in the Map View/group manager tool and clicking the Delete button.

3D View Control Tips The 3D Tool enables you to modify the appearance of your 3D View in the 3D Viewer. The 3D Tool will appear whenever a 3D Viewer is open. If more than one 3D Viewer is open, the parameters of the 3D Tool will represent whichever Viewer currently has focus (selected/highlighted).

Offsetting planes for easier viewing The Offset control on the Planes tab of the 3D Tool enables topographic surfaces that display different data to be offset relative to each other so the information can be displayed more clearly.


The example shown here offsets the Geology plane that was created in a previous exercise by 10m above the true surface and the Surface plane (magnetics draped over the topography relief grid) created with the initial 3D view by 30m above its true location, both relative to the drilling.

By rotating the view in the 3D viewer the offset of both planes can be seen as shown below.

D

Geology plane

Surface plane

Using plane transparency to view integrated data The transparency of individual planes can be reduced, enabling you to visualize how one dataset relates to another. In the example below, the transparency of the Surface plane (magnetics draped over topography) has been reduced approximately 20%, using the slider bar on the Planes tab, so that the underlying Geology plane can be seen. This enables you to better visualize how the geology influences the magnetic signature.

rill3D Tool - Tutorial and Technical Note 28


Note: The Transparency of any 3D plane can be controlled, whether the plane has a relief surface or not.

drill 3d tool - seequent · 2020. 8. 25. · e-mail: [email protected] . contents drill3d tool...

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